Vintage Dirt Bike Q & A

can 79 or 80 cr250 forks be used on a 79 cr125 ? and or what is the differance between them? allso i see alot of people put cr480 fork on 125s, whats the differance here? allso i'm looking for measerments here, linght tube dia, and so on thanks

hummm, must have bad breath

The cr480 forks can be used on the 79 cr125 you have to change the triple clamps too. reuse the steering stem from the 79 because the cr480 unit will be to long for the 125. i did it on my 1980 cr125. One thing i didnt like with this set up was the bars on the cr480 clamp are set very far back. feels like they are in my lap.

dont know anything about the 79-80 cr250 clamps.

Good luck.

Tom

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1980 Honda cr125r
1979 Can-am mx-5 250
2005 Yamaha yz167

Two Strokes Rule!

The 1983 CR forks are 43mm and adjustable. The 1978-1980 forks are 39mm and not. If you have the choice, the 1983 forks are the way to go. You can transplant triple clamps and therefore forks between all of the late 70s and early 80s CRs because the headset bearings are common. There are differences in the length of steerer which require a spacer the size of a large washer to be used. I got a set of 43mm triple clamps that have fixed handlebar mounts that are father forward. It also turned out these triple clamps would accept the 1979 steerer so no need for a spacer.

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Michael Stiles
1979 Honda CR250R Elsinore | 2006 Husqvarna SM510R | 2007 Service Honda CR500R-AF

sorry they are 37mm.
78-80 250 forks can be used in a 79 125 without changing the clamps.
note only 250/480 83 are 43mm, 125´s are 38mm.

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80 CR250Ra
80 CR250Ra
78 CR250R
80 CR80
82 Bultaco Sherpa 340
78 Bultaco Pursang 250 MK12
76 Bultaco Frontera 370 MK10
76 Bultaco Alpina 250
73 Bultaco Lobito 125 MK6
76 Suzuki RM125A
90 Kawasaki KX250